Q 3-define Ray of light. *
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The light traveling in any one direction in a straight line is called a ray of light. A group of light rays given out from a source is called a beam of light. Still have questions? Our expert teachers can help you out.
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A light ray is a line (straight or curved) that is perpendicular to the light's wavefronts; its tangent is collinear with the wave vector. Light rays in homogeneous media are straight.
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